Kamchatka Peninsula, a peninsula of northeast Asia, located in Russia. It is bounded on the east by the Bering Sea and the Pacific Ocean and on the west by the Sea of Okhotsk. Kamchatka is about 800 miles (1,300 km) long and up to 280 miles (450 km) wide.

The peninsula is largely mountainous and contains a range that includes a number of active volcanoes. Klyuchevskaya Sopka, a volcano 15,584 feet (4,750 m) high, is the tallest peak in Siberia. Kamchatka has severe winters and cool summers. The south is heavily wooded, but the forests dwindle to the north; the northern part is tundra.

Kamchatka is sparsely populated. Its inhabitants are Russians, Chinese, Koreans, and native nomads. There are a number of fish canneries, and the fur trade is important. The main town, Petropavlovsk Kamchatskiy, has about 252,000 people.